Lead salt of dinitro benzoic acid and priming composition containing the same



Patented Feb. 19, 1935 j WW PRIM'ING COMPO SITiON CONTAINING -'THE SAlWE Willi'Briin, Bridgeport, Conn, assignor to Remington Arms Company,-Inc., a corporation of Delaware No Drawing. Application October 19, 1931, 1

, Serial No. 569,837

' 13 Claims.

This inventionrelates to certain new chemical compounds of a somewhat explosive nature, to the preparation of such compounds, and to-.-their use,

either alone or in conjunction with other subtures.

The compounds are derivatives of benzoic acid, particularly lead salts of 2- l di-nitro benzoic acid, Two such lead salts have been discovered, and their analyses indicate compositions corresponding respectively to mono-basic lead 2-4 di-f nitro benzoate and di-basic lead 2-4 di-nitrobem tent of 49.07% which corresponds approximately zoate. The mono-basic salt is; prepared as follows: A solution of 2.12 grams of 2-4 di-nitro benzoic acid and .8 grams of sodium hydroxide in 100 c. c. of water is dropped into a solution of 35 grams of lead nitrate in'l00 c. c. of water, at a temperature between 70 and 80 C. The resulting precipitate "is recovered by filtration and washing in the usual manner. It has a lead conto the theoretical lead content, 48.62%, of monobasic lead 2-4 di-nitro benzoate, having the composition C14H6N4015Pb2 and the structural formula The di-basic salt is prepared by dropping a so- These salts are deficient in oxygen and of an explosive or semi-explosive character, and have been found to be highly useful as ingredients of ammunition priming mixtures, in which they are l 5 stances as explosive compositions, particularly as compositions for use as ammunition priming mixbest used as fuel ingredients. Their utility is enhanced by their explosive character, as distinguished from the non-explosive character of the priming mixture fuels hitherto used. 1

One example of a priming mixture including a basic lead salt of 2-4 di-nitro benzoic acid is the When such a mixture is prepared wet, a small percentage of a suitable binder may be added.

This formula, however, is merely typical. The

explosive, mercury fulminate, may be replacedwholly or in part by a nitro organic compound, such as a lead salt of styphnic acid, or such a salt in admixture with guanylnitrosarhinoguanyb tetracene, lead methylene di-iso nitro amine, diazo-di-nitro phenol, a lead salt of picric acid, and similar explosive bodies. Suitable non corrosive oxidizers include other nitrates, such as normal or basic lead nitrate, chromates, permanganates, oxides and peroxides. 'Other fuels, such as lead sulphocyanate, antimony sulphide and/or calcium silicide, may likewise be used in conjunctionwith the lead salts of 2-4 di-nitro benzoic acid; The said lead salts being themselves novel, the appended claims are to be broadlyconstrued.

What is claimed is: V

1. As a composition of matter, a lead salt of 2-4 di-nitro benzoic acid.

2. As a composition of matter, a basic lead salt or 2-4 di-nitro benzoic acid. 7 A

a 3. As a composition of matter, mono-basic lead 2-4 di-nitro benzoate. v

4. As a composition of matter, di-basic lead 2-4 di-nitro benzoate.

5. A priming composition containing a lead salt of 2-4 di-nitro benzoic acid.

6. A priming composition containing a basic lead salt of 2-4 di-nitro benzoic acid.

"7. A priming composition containing monobasic lead 24 di-nitro benzoate.

8. A priming composition containing di-basic 7 lead 2-4 di-nitro benzoate.

9, A priming composition containing a lead,

salt of 2-4 di-nitro benzoic acid, a suitable combustion initiator, and a suitable oxidizer.

10. A priming composition containing -a basic lead salt of 2-4 di-nitro benzoic acid, a suitable combustion initiator, and a suitable oxidizer.

- following: 1

Mercuryfulminate 30% to 50% Barium nitrate 20% to 4.0% .Mono-basic'or di-basic lead 2-4 dinitro benzoate 5% to 15% Abrasive approximately nitro benzoic acid which comprises the addition to an aqueous solution of lead nitrate of an aqueous solution of sodium hydroxide and 2-4 di- 5 nitro benzoic acid. I

12. The method of making mono-basic lead 2-4 di-nitro benzoate which comprises precipitating said salt by the addition to a solution of 3.5 grams of lead nitrate in 100 c. c. of water of 10 a solution of 2.12 grams of 2-4 di enitro benzoic V v V 1 ,991,730

11. The method of making lead salts of 2-4 di- 

